A gardener pushes a lawn roller along a straight level path.
(i) The gardener applies a constant horizontal force of 250N on the roller and moves it 20m. Calculate the work done on the roller.
(ii) Express your answer in (a) joule, (b) kilojoule.
(iii) If the same amount of work were to be expressed in the CGS system, how many dyne-centimetres would it be?